If you get an email about unusual activity on your Microsoft account, or if you’re worried that someone else might have used your account, go to the Recent activity page.You’ll see when your Microsoft account was signed in during the last 30 days, along with any device or app-specific info.

当在新设备中首次启动 Windows 10 时，设备上已安装的防病毒保护程序即是你的默认安全应用。但是，Windows 安全中心已预安装并可随时使用。

Office 2019 is now available as a one-time purchase for commercial and consumer users. Office 2019 is available for both Windows and macOS, and includes classic versions of Word, Excel, PowerPoint, and Outlook.

Closing a Microsoft account means you won’t be able to use it to sign in to any Microsoft products or services, including Outlook.com or Hotmail, OneDrive, Xbox, Skype, Office or Microsoft 365, Rewards and Microsoft Certification.

Microsoft 365 is a subscription service that makes sure you always have the most up-to-date modern productivity tools. If you're looking to buy Microsoft 365, but not sure which plan is right for you, use the information below to help guide your decision.

Export contacts out of other email services. Export iCloud contacts. Export Gmail contacts – See Gmail help. Export Yahoo contacts – See Yahoo import and export help. Export Thunderbird contacts – See Mozilla support.

Erfahren Sie, wie Sie einen Windows-Product Key für die Aktivierung finden und wann Sie stattdessen eine digitale Lizenz verwenden.

Get started with Microsoft Teams (free). Explore your options, find out what’s new, browse help topics, and more.

Windows themes A theme is a combination of pictures, colors, and sounds that help you personalize your PC. The latest versions of Windows include many exciting desktop personalization features, such as panoramic themes that extend across two side-by-side monitors, and the ability to have your theme appear on your Start screen.

Important: If your device is out of support, it is no longer receiving security updates from Microsoft and may become more vulnerable to security risks and viruses.Therefore, we strongly recommend that you update to the latest version of Windows. Each version of Windows is supported for 18 months.